Can a fig tree, my brothers, bear olives? Or a vine, figs? No more can salt water yield fresh.
Either make the tree good and its fruit good, or make the tree rotten and its fruit rotten; for the tree is known by its fruit.
and noticing a fig tree by the roadside he went up to it, but found nothing on it except leaves. He said to it, "May no fruit ever come from you after this!" And instantly the fig tree withered up.
Does a fountain pour out fresh water and brackish from the same hole?